@tk303 The lining is not that thick imo that it matters that much with sizing correctly.
But the denim is quite stiff, and if you're like me, a bit between 2 sizes, you might need to decide for a certain look.
For me at the end, I prefer a slightly bulkier look with this jacket, it being overall a more cold weather jacket that might need to accommodate UHF, etc.
I tried with a M, and even though it did fit, I felt restricted, and most importantly for me, I kind of lost the cozy feeling of a nice warm winter jacket.
Plus you can always shrink it a bit if necessary (CTRL-F the thread to find a user at least who did post shrink results).
Here is a picture with a IH shirt + T-shirt under to give you an idea (same look with a UHF but I took the picture with this one). I'm 180cm and now around 73 kg.
Added bonus for me but I don't like when shirts exceeds too much the jacket length in general, so the slight over-sizing really helps here.
